Ταξιθετικός Αριθμός
H - Social Science
684
P - Language and Literature
118
B - Philosophy, Psychology, Religion
57
K - Law
56
R - Medicine
53
L - Education
33
J - Political Science
27
G - Geography, Anthropology, Recreation
24
F - General American History
17
N - Fine Arts
12
D - World History
11
Q - Science
9
T - Technology
8
U - Military Science
5
C - Historical Sciences
4
M - Music
3
A - General Works
1
E - United States History
1
S - Agriculture
1